Dallier Henri (born in Reims in 1849, died in Paris in 1934)
Harmony teacher, organist at St Eustache then at la Madeleine
Offertory on [Ad Regias]
(my organ version)
1st verse of the hymn:
At the royal banquet of the Lamb,
dressed in our white dresses,
after crossing the Red Sea,
let us sing for Christ our Head.